Wood-screw machine



A. S. COOK.

WOOD SCREW MACHINE.

(N0 Model.)

No. 256,127. Patented Apr. 11,1882.

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UN'rTE STATES ATENT Fries.

ASA S. COOK, OF HARTFORD, CONNECTICUT.

WOOD-SCRE WIIVIACHINE.

SPECIFICATION forming part of Letters Patent No. 256,127, dated April 1], 1882.

Application filed November 25, 1881.

To all whom it may concern:

Be it known that I, ASA S. COOK, of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements inWood-Screw Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, whereby a person skilled in the art can make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Like lettersin the figures indicate the same parts.

My improvement relates to machines of the kind known as threaders, for the manufacture of wood-screws, and more particularly to those in which the pointing and threading is done in the same machine.

The object of my invention is to provide a more efficient and simpler pointing mechanism in connection with the parts required for introducing and holding the blank and cutting the thread than has heretofore been in use.

In the accompanying drawings, illustrating my invention, Figure 1 shows a top view of the jaws for holding the blank while being pointed and threaded and my improved device for pushing the blank into the jaws and forming the point. Fig. 2 is a longitudinal vertical section of the'parts shown in Fig. 1. Fig. 3 is a cross-section of the pointing device on the line a 1). Fig.4 isafrontview ot' the adjustable stop for gaging the distance moved forward by the pointing mechanism, and the position of the point on the blank.

The parts shown and described are supposed to belong to an ordinary threader, which 01)- erates automatically to place the blank in the jaws, and to have suitable machinery for cutting the thread on a wood-screw.

A A are the jaws which hold the blank while being pointed and threaded in the usual manner. They are revolved by a pulley and open and close to receive or drop the blank.

Bis a reciprocating arm, moved by the mechanism of the machine for the pushingin of the blank in the customary manner, so that it can be griped by thejaws.

O is a block carried by and attached to arm B, and forming part of my improved feeding and pointing device.

D is a sliding block connected with block 0 (No model.)

by the springs K, and provided with the guide D, entering a socket in block 0.

E is a bar which passes through a socket in block 0, into which it fits, and in which it slides and enters a socket in block D, in which it is secured by the set-screw F.

G is an adjustable stop, movable back and forth in a groove in part of the fixed frame H of the machine, and held in place by the setscrew G. This stop or gage is for the purpose of arresting the forward movement of the bar E by coming in contact with the pin J, fixed in the block I).

L is the head or pointing device attached to the bar E. It fits onto the end of bar E and is firmly held by the set-screw M. It has an aperture, L, in the end, which is for the entrance of the blank.

N is the cutting-tool for pointing the blank.

It fits into the slot E in the bar E and extends outward into the head L, and is held firmly in place by the set-screw 0. The cutting-edge is made of suitable shape to turn the point of the blank to the proper form. Pshows the position ofthe tool which cuts the screw-thread upon the blank.

. The operation of my improvement is as follows: The blank is brought down by the feeding mechanism and held in front of thejaws A. The bar B then advances and carries with it the bar E. The end of the blank passes into the aperture L and is pushed into the jaws. As the bar B advances and presses the blank home the springs K yield, and the block I) is retarded in its forward movement by the blank until the revolving jaws turn the blank so as to form the point, and the pin J comes in contact with the gage Gr. Thislimits theforward movement of bar E, and allows the cutter N to turn and finish the point without further advance. The head L then withdraws from the blank whilethethreadisformedin thecustomary manner by successive cuts of the tool P. Previous 5 a further advance of the tool beyond that point.

It will be observed that the bar E and head L serve both to push the blank into the jaws and to point it when it is firmly held by them and commences to turn.

What I claim as my invention is- IOC 1. In combination with the revolving jaws 3. The adjusting-gage G, in combination Aand the reciprocating arm B of a screwwith the yielding block D, having a stop, J, threading machine, the longitudinally-moving the bar E, the head L, carrying the pointingz 5 bar E, provided with the head L, and the cuttool, and the frame H of the machine, substan- 5 ter N, constructed and arranged to push the tially as described.

blank into the jaws and to turn the point as the jaws revolve, substantially as described. ASA S. COOK.

2. The combination of the block (1, the yielding block D, the springs K, the bar E, the Witnesses:

I0 head I}, and the cutting-tool N, the whole form- THEO. G. ELLIs,

ing an inserting and pointing device, substan- WILMOT HORTON. tially as described. A 

